UPDATE, 7:29PM A severe thunderstorm warning has been issued for eastern Cheshire County and portions of Hillsborough County, including the cities of Nashua and Manchester. The warning remains in effect through 8:15 p.m.

National Weather Services said the thunderstorm is capable of producing damaging winds exceeding 60 miles per hour.

Flash flood warnings were issued earlier for portions of Coos, Carroll and Grafton counties in northern New Hampshire through 7:45 p.m.

Sullivan County and western Merrimack County in central New Hampshire are under a flood advisory through 9:30 p.m.

UPDATE, 5:36 p.m.: A severe thunderstorm warning remains in effect until 6:15 p.m. for northwestern Hillsborough and northern Cheshire counties, according to the National Weather Service.

Doppler radar continued to Indicate a severe thunderstorm capable of producing golf ball-size hail and damaging winds in excess of 60 mph. This storm was

located near Stoddard or 13 miles northeast of Keene, moving northeast at 30 mph.

Strong thunderstorms will also impact Sullivan County, Belknap County and Merrimack County through 6:15 p.m.

At 5:24 p.m, the National Weather Service Doppler radar indicated a cluster of strong thunderstorms centered 2 miles southwest of Lempster, or about 14 miles southeast of Claremont, moving east at 45 mph. This cluster of strong thunderstorms will affect areas in and around Mount Sunapee State Park, East Lempster, Washington, Pillsbury State Park, and Sutton through 6:15 p.m.

The National Weather Service says a severe thunderstorm warning issued for southwestern Grafton, northwestern Merrimack and northern Sullivan counties has been canceled. The weather service said the thunderstorm was no longer producing severe weather.

They do ask residents to report hail or strong winds to the National Weather Service by calling toll free 1-877-633-6772.

A severe thunderstorm watch remains in effect until 10 p.m. Tuesday evening for northern New Hampshire.

Earlier stories follow:

A tornado warning remains in effect until 5:15 p.m. for Northern Cheshire County, according to a statement from the National Weather Service.

At 4:46 p.m., Doppler radar continued to indicate a possible tornado located near Westmoreland, about 8 miles south of Bellows Falls, Vt., and moving northeast at 30 mph.

The National Weather Service reported that the storm is also capable of producing golf ball-size hail and destructive straight-line winds.

A severe thunderstorm watch remains in effect until 10 p.m. Tuesday evening in Southern New Hampshire.

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An area of Cheshire County is under a tornado warning until 4:15 p.m.

The National Weather Service said a severe thunderstorm with strong rotation was located near Walpole and Bellows Falls, Vt., traveling northeast at 25 mph.

Alstead is also part of the warning.

The storm is also capable of producing hail larger than a golf ball and destructive straight-line winds.

The Weather Service also warned about a severe thunderstorm near Surry moving northeast about 30 mph. It could produce quarter-sized hail and winds of 60 mph. Towns in its potential path include Gilsum, Sullivan, Nelson, Marlow, Stoddard, Windsor, Deering, Hillsborough and Weare. The warning is in effect until 4:45 p.m.

The National Weather Service issues a tornado watch when conditions in the area are favorable for the development of tornadoes.

A tornado warning is issued when a tornado is indicated by radar or sighted by spotters. People in affected areas should seek immediate safe shelter.

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Storms that resulted in tornado warnings issued Tuesday for several northern Vermont counties are heading southeast toward northern New Hampshire and the Connecticut River valley.

'There are storms just across the border that are pretty intense and moving east. We are watching (them) very carefully,' National Weather Service meteorologist John Cannon said Tuesday afternoon.

'There is a potential for damaging winds, large hail and very isolated tornadoes in New Hampshire with the main threat being the Connecticut River Valley and northernmost New Hampshire,' specifically Coos and northern Grafton counties, Cannon said. The potential threat will continue through 7 p.m., he said.

Currently, New Hampshire benefits from having 'more cool and more stable air' which would diminish the storms' potential impact, he added.

Two tornado warnings were issued for several northern Vermont counties Tuesday - including Orleans, Caledonia and Franklin, Cannon said.

Meanwhile, New Hampshire is on target for a second round of showers and potentially serious thunderstorms that should pass through the state until about 9 tonight, Cannon said.